Release sheet

Abstract

A composite sheet of a polymeric film form base liner, a cured release coating laminated to at least one side of the base liner, and a coating of at least one high surface energy material (a surfactant/emulsifier) on at least one surface of the base liner.

What is claimed is: 
     
       1. In a composite, self supporting, flexible sheet comprising a film form base inner having laminated to at least one side thereof a release coating comprising: cured silicone-acrylate, and   moieties of silicone-acrylate which are cured to an insufficient extent that such upon storage they tend to migrate out of said release coating to a surface thereof and therefore interfere with ink receptivity;   the improvement, whereby ameliorating the interference of said moieties with ink receptivity, which comprises on at least one side of said base liner, a coating of a surfactant/emulsifier material in an amount sufficient to at least reduce said migration of said insufficiently cured silicone-acrylate.   
     
     
       2. The improved composite sheet claimed in claim 1 wherein said coating consists essentially of said surfactant/emulsifier, and is disposed between said base liner and said release coating. 
     
     
       3. The improved composite sheet claimed in claim 1 wherein said surfactant/emulsifier coating is disposed on the side of said base liner opposite to the side having said release coating. 
     
     
       4. The improved composite sheet claimed in claim 2 including ink indicia disposed on the side of said base liner opposite to said release coating. 
     
     
       5. The improved composite sheet claimed in claim 1 including tacky adhesive releasably adhered to said release coating. 
     
     
       6. The improved composite sheet claimed in claim 5 including a film releasably secured to said adhesive. 
     
     
       7. The improved composite sheet claimed in claim 1 including a face layer having tacky adhesive on at least one surface thereof, releasably adhered to said release coating through said tacky adhesive. 
     
     
       8. The improved composite sheet claimed in claim 1 wherein said surfactant is at least one member selected from the group consisting of a polyethylene oxide, a block copolymer of propylene oxide and ethylene oxide, an alkyl polyethoxy ethanol, a methyl vinyl ether/maleic anhydride copolymer, a dioctyl ester of sodium sulfosuccinic acid, a polyoxyethylene lauryl ether, a polyoxyethylene stearate, a sorbitan monostearate, a polyoxyethylene distearate, and an ethylene glycol monostearate. 
     
     
       9. The improved composite sheet claimed in claim 2 or 3 wherein said surfactant/emulsifier is combined with a binder. 
     
     
       10. The improved composite sheet as claimed in claim 9 wherein said binder is at least one member selected from the group consisting of an ethylene-acrylic acid copolymer, an acrylic polymer, an ionomer, and a melamine-formaldehyde resin. 
     
     
       11. The improved composite sheet claimed in claim 1 wherein said base liner is selected from the group consisting of paper, oriented polypropylene, polyethylene, polyamide, polystyrene and polyethylene terephthalate. 
     
     
       12. The improved composite sheet claimed in claim 6 wherein said film is selected from the group consisting of paper, oriented polypropylene, polyethylene terephthalate, polyethylene, polystyrene, and metal foil. 
     
     
       13. The improved composite as claimed in claim 9 wherein said binder comprises up to 50% of said coating.